What is a DDoS simulation (samp) and why would I need to download one?

A DDoS simulation, often packaged as a 'samp' file (short for sample), is a pre-configured network traffic pattern designed to mimic a Distributed Denial of Service (DDoS) attack. Downloading one allows network administrators and security professionals to test their defenses, identify vulnerabilities, and fine-tune mitigation strategies without launching a real attack, which is illegal and harmful. They're used for training, testing firewalls, intrusion detection systems, and load balancers.